If you’re having trouble accessing files or photos stored in Dropbox, there’s a good chance your computer is caching those files. You can clear the cache on a Mac by following these steps:

  1. Open Finder and go to your Dropbox folder.
  2. Click on the “Dropbox” icon in the menu bar at the top of the screen and select “Preferences.”
  3. In the “General” tab, click on the “Cache” button and select “Off.” ..